Washing dishes by hand uses less energy than running an electric dishwasher.

This is one instance where the modern machine beats the old-fashioned method: hand washing generally uses more hot water per load than using a dishwasher. The key to maximizing energy savings is to use the dishwasher efficiently. Most modern dishwashers don’t require pre-rinsing of dishes. This practice wastes up to 20 gallons of water per load without getting dishes any cleaner.

Wait to run the dishwasher until you have a full load of dishes, but don’t overload the machine. The energy-saving control offered on many dishwashers will turn off the heat during the drying cycle, which will also help keep the kitchen cooler in the summer.Opening the door after the rinse cycle and letting the dishes air dry is another way to save energy.